Legkorszerbb
Legkorszerbb appears to be a nonstandard or misspelled form of the Hungarian word legkorszerűbb, which translates to “the most modern” or “state-of-the-art.” It is not a place-name or a widely recognized term in standard Hungarian dictionaries, and its appearance is typically limited to informal writing, typos, or stylized uses.
Etymology and linguistic notes: In Hungarian, the prefix leg- marks the superlative, and korszerű means modern.
Usage and examples: In formal or edited Hungarian, legkorszerűbb should be used. For example: Ez a készülék
See also: korszerű, leg- as a superlative prefix, magyar helyesírás.